Karthikeyan, K. Amaresh, S. Kim, K. J. Kim, S. H. Chung, K. Y. Cho, B. W. Lee, Y. S. 2024-01-20T12:02:58Z 2024-01-20T12:02:58Z 2021-09-05 2013-07 2040-3364 https://pubs.kist.re.kr/handle/201004/127921 For the first time, we report the possibility of utilizing Li2CoPO4F as a novel cathode material for hybrid capacitor applications. Li2CoPO4F powders were prepared by a conventional two-step solid state method. A hybrid cell was fabricated using Li2CoPO4F as the cathode along with activated carbon (AC) as the anode in 1 M LiPF6 dissolved in 1 : 1 EC/DMC electrolyte and its electrochemical properties were examined by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and constant current charge-discharge (C-D) techniques. The Li2CoPO4F/AC cell is capable of delivering a discharge capacitance of 42 F g(-1) at 150 mA g(-1) current density within 0-3 V region having excellent coulombic efficiency of over 99% even after 1000 cycles. Furthermore, the Li2CoPO4F/AC cell exhibited excellent rate performance with an energy density of similar to 24 W h kg(-1) at 1100 mA g(-1) current and maintained about 92% of its initial value even after 30 000 C-D cycles. Electrochemical impedance spectroscopy was conducted to corroborate the results that were obtained and described. English ROYAL SOC CHEMISTRY SUPERCAPACITOR FLUOROPHOSPHATE ELECTRODE TRANSITION A high performance hybrid capacitor with Li2CoPO4F cathode and activated carbon anode Article 10.1039/c3nr00760j 1 NANOSCALE, v.5, no.13, pp.5958 - 5964 NANOSCALE 5 13 5958 5964 scie scopus 000320398300037 2-s2.0-84883254657 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article SUPERCAPACITOR FLUOROPHOSPHATE ELECTRODE TRANSITION Li2CoPO4F hybrid capacitor